List of antimicrobial agents considered in the study.

For each of these antibiotics and each admission event, binary variables record whether the antibiotic: a) was currently prescribed, b) has been prescribed to the same patient in a previous admission, c) resistant isolate was detected, d) susceptible isolate was detected, e) was prescribed within 72 hrs of admission (early prescription); other variables record f) the number of times resistant isolates were detected in previous admissions, d) the number of times susceptible isolates were detected in previous admissions. The 4th and 5th columns report the number of admissions which had resistance tested and outcome positive (R) and negative (S), respectively. Resistance during the current admission to the four drugs marked with a star (AUG, CIP, MEM, and TAZ) are outcomes set to be predicted by four different AI classifiers.